package second.eight;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.StringTokenizer;


public class Main {

	public static void main(String[] args) throws Exception {
		BufferedReader reader = new BufferedReader(new InputStreamReader(
				System.in));
		int num = Integer.parseInt(reader.readLine());
		int i = 0;
		while(i < num){
			String input = reader.readLine();
			StringTokenizer st = new StringTokenizer(input);
			while(st.hasMoreTokens()){
				int element = Integer.parseInt(st.nextToken());
				System.out.print(Character.toString((char) element));
				i ++ ;
			}
		}
	}
}
